Winthrop, WA Weather & Growing Conditions
This Afternoon
34°F
Chance Light Snow
A chance of snow after 4pm. Mostly cloudy. High near 34, with temperatures falling to around 30 in the afternoon. South wind around 5 mph. Chance of precipitation is 40%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 34°F | Chance Light Snow | 5 mph S | 42% |
| Tonight | 27°F | Light Snow Likely | 5 to 8 mph SW | 65% |
| Thursday | 30°F | Mostly Sunny | 5 to 9 mph W | 7% |
| Thursday Night | 24°F | Mostly Cloudy then Slight Chance Light Snow | 5 to 12 mph S | 18% |
| Friday | 32°F | Light Snow Likely | 8 to 13 mph S | 71% |
| Friday Night | 30°F | Chance Rain And Snow | 7 to 10 mph S | 37% |
| Saturday | 33°F | Slight Chance Light Snow then Mostly Cloudy | 7 to 10 mph SE | 17% |
| Saturday Night | 27°F | Rain And Snow Showers | 9 to 17 mph S | 88% |
| Sunday | 31°F | Rain And Snow Showers | 5 to 16 mph SW | 88% |
| Sunday Night | 23°F | Slight Chance Snow Showers then Mostly Cloudy | 5 mph NW | 15% |
| Monday | 29°F | Partly Sunny then Slight Chance Snow Showers | 6 mph SW | 15% |
| Monday Night | 26°F | Snow Showers Likely | 5 to 8 mph SW | 56% |
| Tuesday | 31°F | Snow Showers Likely | 8 mph S | 60% |
| Tuesday Night | 29°F | Rain And Snow Showers Likely | 7 to 10 mph S | 60% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Winthrop, WA
Last spring frost
May 9
First fall frost
Sep 29
Growing season
142 days
Hardiness zone
6a
Explore more for Winthrop, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Mazama, Wa (12.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.